I can’t cover all of the airlines, but I think this should give you a good idea of the average free checked luggage allowances. One thing that appears to be consistent- 62 inches total size around. Presumptions: flight from USA and on an economy ticket.
| Airline | Size | Free Pieces | Weight |
| China Southern | 62 Inches Total | 2 Pieces | 50 lbs |
| American Airlines | 62 Inches Total | 2 Pieces | 50 lbs |
| United Airlines | 62 Inches Total | 0 Pieces | 50 lbs |
| Delta Airlines | 62 Inches Total | 1 Piece | 50 lbs |
| Emirates | 62 Inches Total | 2 Pieces | 50 lbs |
| Southwestern Airlines | 62 Inches Total | 2 Pieces | 50 lbs |
| Lufthansa | 62 Inches Total | 1 Pieces | 50 lbs |
| Air China | 62 Inches Total | 2 Pieces | 50 lbs |
| Air France | 62 Inches Total | 1 Pieces | 50 lbs |
| British Airways | 81 Inches Total | 1 Pieces | 51 lbs |
Student Ramblings 